SWANS coach Paul Roos made the stark admission on Saturday night that Geelong at their best are unbeatable.

Speaking after the Cats inflicted an impressive 39-point victory over the Swans in their round 20 clash at ANZ stadium, Roos was of the opinion that if Geelong can maintain their best form they are certainties for the premiership.

"They're the benchmark, no question. They're a cut above the rest of the competition by a fair margin. If they play their best, no-one will beat them," Roos said at his post-match press conference.

Roos, who equalled Rodney Eade’s coaching record at the Swans in his 152nd game on Saturday, was thankful he won’t have to worry about the Cats again – at least until September. Adelaide’s victory over Essendon at Telstra Dome earlier in the day means his side are now fifth with matches against fellow finals contenders Collingwood and the Brisbane Lions to come.

Considering Geelong’s victory was achieved without key defender Matthew Scarlett (back soreness), David Wojcinski and Darren Milburn, the Swans coach gave credit where it was due.

"When they [Geelong] are playing at their absolute maximum, they do show why they are the best team in the competition," he said..

"You can match them for periods but a game goes for 120 minutes and that's why they are so difficult to beat. We played periods of good footy but they have a lot of players in very good form.

"In the consistency of the 22 versus the 22, theirs is clearly better."

 Roos said there was of course hope with the cyclical nature of teams' dominance in the competition with the salary cap, but that this is the age of the Cat.

"The competition is designed for parity. It's Geelong's time. They're well coached and it just happens to be their time in the sun. We'd all like to have our day in the sun but that's not the reality of the salary cap."

Roos also paid tribute to Paul Bevan after the 23-year-old tagger did an impressive job on stars Steve Johnson and Gary Ablett and said his consistency over four quarters was inspirational.

"He's hungry and he's a young kid who's got desire and is a good competitor who has a good pedigree with his family's rugby league background,” he said.

"That's the trick in AFL footy, to compete each week and if you do, you give yourself a chance of becoming a really good player.

"We threw him on Gary Ablett late in the game and Bevo played on Stevie Johnson for a fair bit of the night, so (he did well).”

Injury concerns for the Swans include Jared Crouch, who came out of the match with neck soreness, and Roos revealed Jarred Moore twisted his knee.